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This commit is contained in:
furrtek 2016-01-31 09:34:24 +01:00
parent 29ec87a9ad
commit 44638e504b
166 changed files with 8700 additions and 3967 deletions
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27
firmware/baseband/channel_decimator.cpp
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@ -21,7 +21,7 @@
#include "channel_decimator.hpp"
buffer_c16_t ChannelDecimator::execute_decimation(buffer_c8_t buffer) {
buffer_c16_t ChannelDecimator::execute_decimation(const buffer_c8_t& buffer) {
const buffer_c16_t work_baseband_buffer {
work_baseband.data(),
work_baseband.size()
@ -39,19 +39,15 @@ buffer_c16_t ChannelDecimator::execute_decimation(buffer_c8_t buffer) {
* -> gain of 256
* -> decimation by 2
* -> 1.544MHz complex<int16_t>[1024], [-32768, 32512] */
const auto stage_0_out = translate.execute(buffer, work_baseband_buffer);
//if( fs_over_4_downconvert ) {
// // TODO:
//} else {
// Won't work until cic_0 will accept input type of buffer_c8_t.
// stage_0_out = cic_0.execute(buffer, work_baseband_buffer);
//}
auto stage_0_out = execute_stage_0(buffer, work_baseband_buffer);
if( decimation_factor == DecimationFactor::By2 ) {
return stage_0_out;
}
/* 1.536MHz complex<int16_t>[1024], [-32768, 32512]
* -> 3rd order CIC: -0.1dB @ 0.028fs, -1dB @ 0.088fs, -60dB @ 0.468fs
* -0.1dB @ 43kHz, -1dB @ 136kHz, -60dB @ 723kHz
* -> gain of 8
* -> gain of 1
* -> decimation by 2
* -> 768kHz complex<int16_t>[512], [-8192, 8128] */
auto cic_1_out = cic_1.execute(stage_0_out, work_baseband_buffer);
@ -82,3 +78,14 @@ buffer_c16_t ChannelDecimator::execute_decimation(buffer_c8_t buffer) {
return cic_4_out;
}
buffer_c16_t ChannelDecimator::execute_stage_0(
const buffer_c8_t& buffer,
const buffer_c16_t& work_baseband_buffer
) {
if( fs_over_4_downconvert ) {
return translate.execute(buffer, work_baseband_buffer);
} else {
return cic_0.execute(buffer, work_baseband_buffer);
}
}